Portions of an optical instrument



FIG. 1 is a front perspective view of portions of an optical instrument according to the invention.

FIG. 2 is a left side elevational view of the portions of the instrument.

FIG. 3 is a rear elevational view of the portions of the instrument.

FIG. 4 is a front elevational view of the portions of the instrument.

FIG. 5 is a top plan view of the portions of the instrument; and,

FIG. 6 is a bottom plan view of the portions of the instrument.

In the above drawings, any portions shown in broken lines do not form a part of the invention. In addition, any views not shown thereof do not form a part of the invention. 

The ornamental design for portions of an optical instrument, as shown and described. 